javascript check type of variable var
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
if(typeof bar === 'number') {
//whatever
}typeof("string"); //string
typeof(123); //number//typeof() will return the type of value in it's parameters.
//some examples of types: undefined, NaN, number, string, object, array
//example of a practical usage
if (typeof(value) !== "undefined") {//asuming value is already set
//execute code
}typeof("iAmAString");//This should return 'string'
//NO camelCase, as it is a JS Keyword// You can use the built-in method 'typeof' in order to check the variable datatype
//examples:
typeof "hello" // "string"
//or
var a = 1;
typeof(a);
//the output will be > 'number'> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
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